| Abbreviation | Definition |
|---|---|
| GPYC | Grosse Pointe Yacht Club |
| GRAC | Glen Rock Athletic Club |
| GRAC | Grand Rapids Agility Club |
| GRAC | Grand Rapids Audubon Club |
| GRCA | Golden Retriever Club of America |
| GRCN | Golden Retriever Club Nederland |
| GRCV | Golden Retriever Club of Victoria |
| GRDC | Ginetta Racing Drivers Club |
| GRFC | Grand Rapids Football Club |
| GRFC | Gravesend Rugby Football Club |
| GRGBC | Grand Rapids Griffins Booster Club (Grand Rapids, MI) |
| GRNC | Genesee Region Newfoundland Club |
| GRRC | Galesburg Road Runners Club |
| GRRC | Goodwood Road Racing Club |
| GRRC | Gopher Rifle and Revolver Club |
| GRRC | Grand Rapids Running Club |
| GRSC | Glen Rock Soccer Club |
| GRSC | Grand River Sailing Club |
| GRSC | Guilford Racquet and Swim Club |
| GRTC | Greater Rochester Track Club |